奈何桥下一滴泪
[nài hé qiáo xià yī dī lèi]
In Chinese folklore, “Naihe Bridge” (Bridge of Helplessness) is where souls cross into the afterlife and forget their past sorrows before reincarnation. A “single tear under this bridge” symbolizes sorrowful farewell or unresolved pain left in one’s former life that can’t be forgotten so easily.